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Ford Fiesta ST 2013 Xcell Dump Valve Sound Rev

2384 Views 8 Replies 6 Participants Last post by  graynicolas11
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I think that noise would get old after about 5 minutes. I must be getting old.
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Other than sound, what does this do? Performance? Less wear and tear on other parts? Nothing?
On the ST they do nothing but make sound.
1 - 2 of 9 Posts
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